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.NET Forum / ASP.NET / Building Controls / September 2006How to write a control that doesn't require a closing tag
Hi all, I've built a custom control that won't contain any inner content. If I derive the control from Control, then the VS editor will always add the closing tag when I use the control. I can derive from UserControl and it doesn't do this, but I'm not sure whether is the best way to do this. What is the correct way to make a control that is self-closing (i.e. doesn't have a closing tag)? Thanks, Paul > Hi all, > [quoted text clipped - 6 lines] > What is the correct way to make a control that is self-closing (i.e. > doesn't have a closing tag)? May I ask why you want to do this? You will need the closing tag for XHTML compliance, or at least the closing slash: <my:tag/> John Hi John, I want the closing slash, just not the closing tags. When the designer auto-closes tags, it sometimes appends a " />" and for others it'll append a "</my:tag>". I just wanted to know the correct way to write a control where the form designer knows won't accept any inner content. Thanks, Paul > > Hi all, > > [quoted text clipped - 13 lines] > > John > Hi John, > [quoted text clipped - 4 lines] > I just wanted to know the correct way to write a control where the form > designer knows won't accept any inner content. I don't beleive this is possible with .NET 1.1. Maybe in 2.0, but I don't know. Will your control produce an error if there is inner content? Would inner whitespace be ok? John The control won't throw an error - it just won't display any of the inner content. I just wanted to emulate some of the existing server control behaviour where it auto-closes with the "/>". I can achieve this by deriving the control from UserControl, but I just thought there'd be a better way of doing this. Paul > > Hi John, > > [quoted text clipped - 12 lines] > > John > The control won't throw an error - it just won't display any of the > inner content. I just wanted to emulate some of the existing server > control behaviour where it auto-closes with the "/>". I can achieve > this by deriving the control from UserControl, but I just thought > there'd be a better way of doing this. Out of curiosity, which controls auto-close like this, other than user controls? John > I want the closing slash, just not the closing tags. When the designer > auto-closes tags, it sometimes appends a " />" and for others it'll > append a "</my:tag>". For your Control, have ToolboxData attribute with appropriate values. eg: [ToolboxData("{0}:ControlName runat='server />"] public class MyCustomControl : Control { ... }  SignatureHappy Hacking, Gaurav Vaish | http://www.mastergaurav.com http://www.edujinionline.com http://articles.edujinionline.com/webservices ------------------- Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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